Friday, November 29, 2019

Must-read Q&A from @nephologue who established Garrett's constant #physics

From where comes the statement that we would need to build approximately 1 nuclear power plant (1 GW?) every day in order to (just) stabilize CO2 emissions?
The current annual rate of growth of global energy consumption is 2.3%, or a few hundred GW. In a fossil fuel economy, CO2 emissions rise with energy consumption. It is often advocated that increasing energy efficiency can stall energy consumption growth. What I have shown is that this is only true locally. Globally increasing energy efficiency accelerates growth through a generalized version of Jevon’s Paradox. This leaves switching to non-carbon fuel sources as the only option for meeting the goal of stabilizing emissions while growing the economy. Divide a few hundred GW annual growth by the number of days in a year and one obtains the figure of 1GW of non-carbon energy per day. That’s roughly one nuclear power plant per day.
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